Hello all, sorry if something similar has been posted before.
I have this clacking noise on my truck after an AFM delete. Went back in with an GM L8T cam, DELPHI LS7 lifters, and upgraded but stock length pushrods (7.850). I have double and triple checked everything is torqued down correctly in regards to the rocker arm bolts. When I touch a stethoscope to the fuel line that goes underneath the intake manifold and to the HPFP the noise is clear as day and very loud. I installed a new cam follower when did the rebuild. What could this noise be? Is it normal? I’ve been losing my mind trying to figure it out.
And yes I remembered to put the foam cover back in underneath the intake manifold.
here is a link to a video of the sound:
